name: Publish Release

# This workflow is triggered ONLY when a new release is created in GitHub
on:
  release:
    types: [ created ]

jobs:
  build:
    name: Build Release Artifact
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        # Checks out the specific Git tag associated with the release
        uses: actions/checkout@v4

      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '21'
          cache: 'gradle'

      - name: Build with Gradle
        run: ./gradlew build

      - name: Upload JAR artifact for publisher job
        uses: actions/upload-artifact@v4
        with:
          name: app-jar
          path: build/libs/*.jar # Adjust path if needed
          retention-days: 1

  publish:
    name: Publish to GitHub Container Registry
    runs-on: ubuntu-latest
    needs: build # This job waits for the 'build' job to succeed
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Download JAR artifact from build job
        uses: actions/download-artifact@v4
        with:
          name: app-jar
          path: build/libs

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            # Tag with the release version (e.g., v1.2.3)
            type=raw,value=${{ github.ref_name }}
            # Also tag as 'latest'
            type=raw,value=latest

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}